CN106572502A - Wireless communication network on-demand channel dynamic bandwidth allocation method - Google Patents
Wireless communication network on-demand channel dynamic bandwidth allocation method Download PDFInfo
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- CN106572502A CN106572502A CN201610961014.9A CN201610961014A CN106572502A CN 106572502 A CN106572502 A CN 106572502A CN 201610961014 A CN201610961014 A CN 201610961014A CN 106572502 A CN106572502 A CN 106572502A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/20—Negotiating bandwidth
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/52—Allocation or scheduling criteria for wireless resources based on load
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Abstract
The invention provides a wireless communication networks on-demand channel dynamic bandwidth allocation method. According to the specific process of the method, on-demand channel dynamic bandwidth allocation of a mobile station in a fixed area is realized through adopting two-layer dynamic bandwidth allocation strategy combination; according to a first-layer dynamic bandwidth allocation strategy, base station coverage is divided into various sub-regions, and corresponding channel bandwidth is dynamically allocated to the sub-regions; according to a second-layer dynamic bandwidth allocation strategy, and corresponding channel bandwidth is allocated to the service application levels of the sub-regions according to the service application levels and priorities in a network. With the method adopted, bandwidth required by each user can be effectively determined according to the quality of service requirements of services; and under a condition that bandwidth resources are constant, the utilization rate of the bandwidth can be obviously improved, and the QoS (quality of service) requirements of high-priority services can be ensured.
Description
Technical field
The present invention relates in cordless communication network channel dynamic bandwidth allocation technology field, it is more particularly to a kind of wireless
Communication network dynamics of channels bandwidth allocation methods on demand.
Background technology
In recent years, cordless communication network quickly grows, and it has obtained suitable significant progress and raising.So powerful
Under growth momentum, the development of network application is data transfer progressively by single data transfer being transitioned into data, voice, image
Etc. the multimedia business transmission of integrated information, new generation of wireless access network greatly have impact on the life of the people, working and learning
The various aspects such as amusement.And how under limited bandwidth resources further optimum organization resource, more preferable bandwidth control is provided
System and wideband switch-in business with a greater variety, also to the performance such as speed and QoS (Quality of cordless communication network
Of Service, Qos) ensure to put forward higher requirement.Due to the finiteness of radio air interface resources, for bandwidth allocation
The problem of algorithm, according to investigation, existing algorithm is broadly divided into following two big class：Static bandwidth allocation (Static Bandwidth
Allocation, SBA) and Dynamic Bandwidth Allocation (Dynamic Bandwidth Allocation, DBA).
(1) static bandwidth allocation
Static bandwidth allocation algorithm SBA distributes the bandwidth of fixed size, SBA algorithms in a polling cycle for each MS
Bandwidth negotiation process is not needed, thus it is very simple, easily realize.But, fixed time slot distribution easily causes the wave of time slot
Take, i.e., bandwidth resources are not fully utilized.And, it is not conform to very much using static bandwidth allocation for rate services
Suitable, if carrying out bandwidth allocation according to peak rate, the resource of whole system will soon be exhausted, bandwidth availability ratio is very low.
(2) Dynamic Bandwidth Allocation
Dynamic Bandwidth Allocation is that, based on request and the samsara mechanism for authorizing, its basic thought is distribution according to need, i.e. BS roots
Distribute different bandwidth to each MS according to the real-time bandwidth demands of each MS, could so improve the utilization rate of bandwidth, reduce dividing
Group time delay, increases throughput of system.In dynamic bandwidth request mechanism, each MS sends in turn upstream data, sends every time
The size of start time and time slot is all by BS centralized Controls.
But, the basic process of Dynamic Bandwidth Allocation is primarily present two big defects：One is to be difficult to select suitable bandwidth to ask
Ask --- authorization cycles.This cycle directly affects the performance of system, and authorization cycles are less, and the uplink time delay of system is got over
It is little, but bandwidth availability ratio is lower；Authorization cycles are bigger, and bandwidth availability ratio is higher, but the uplink time delay of system will become big.Its
Secondary, prior defect is not account for qos parameter.
The content of the invention
It is contemplated that at least solving technical problem present in prior art, a kind of channel radio is especially innovatively proposed
Communication network dynamics of channels bandwidth allocation methods on demand.
In order to realize the above-mentioned purpose of the present invention, the invention provides a kind of cordless communication network dynamics of channels bandwidth on demand
Distribution method, comprises the steps：
S1, forms ground floor Dynamic Bandwidth Allocation strategy：All subregion S is divided for base station rangej(j=1,
2 ..., m), the α of all subregion is calculated respectivelyjAnd βjValue, and for all subregion SjCorresponding channel width B of dynamically distributesj=
[(0.4αj+0.6βj)B]Round；
S2, forms second layer Dynamic Bandwidth Allocation strategy：In the channel width of every sub-regions distribution, the is ensured first
1 class business-level has sufficient amount of bandwidth, is processed using the processing mode of integrated service model；Secondly, in order to protect
The 2nd class business-level is demonstrate,proved not by the situation of the complete occupied bandwidth of the 1st class business-level, first minimum guarantor is reserved for such business
Card bandwidth；Therefore, distribute after bandwidth if the 1st class business-level, remaining more bandwidth, i.e., the situation of light load, that
2nd class business-level is preferably serviced；But if the 1st class business-level is in the case of heavy duty, then the 2nd class business
Rank can only be assigned to as its reserved minimum guarantee bandwidth；Bandwidth can constantly adjust business in being spaced at a fixed time
Bandwidth is improving the overall performance of system.
S3, ground floor Dynamic Bandwidth Allocation strategy and second layer Dynamic Bandwidth Allocation strategy joint are realized in fixed area
Dynamics of channels bandwidth allocation on demand to mobile station (Mobile Station, MS).
Described cordless communication network dynamics of channels bandwidth allocation methods on demand, it is preferred that the S1 includes：
S1-1, in fixed area, according to the scope opsition dependent that BS is covered many sub-regions S is divided intoj(j=1,
2,...,m)；
S1-2, in the BS areas of coverage, judges mobile station MSiWhether to be communicated with BS, if desired then be entered S1-3；It is no
Then do not operate, terminate；
S1-3、MSiTo BS reporting position informations, need the information such as the type and data volume size of transmission data；
S1-4, BS judge whether channel is idle, if idle, judge MS according to positional information firstiResiding subregion
Sj, into S1-5；Such as not idle, end；
S1-5, BS calculate respectively all subregion SjαjAnd βjValue, while calculate being assigned to subregion SjChannel
With a width of Bj=[(0.4 αj+0.6βj)B]Round。
Described cordless communication network dynamics of channels bandwidth allocation methods on demand, it is preferred that the S2 includes：
S2-1, when for subregion SjAfter distributing channel width, BS is first audio service, the network of the 1st class business-level
The bandwidth of whole MS distribution fixations of control business, then each MS difference of the audio service for the 1st class business, network control traffic
Distribution bandwidth；
S2-2, for the 1st class business-level other application MS, BS combine priority height be the 1st class business-level
Whole MS of other application be respectively allocated fixed bandwidth, then be respectively allocated for each MS of the other application of the 1st class business
Bandwidth；
S2-3, the MS for the 1st class business-level are all distributed and remaining bandwidth are calculated after bandwidth, and BS presses the 2nd class business
The bandwidth demand ratio of rank, whole applications of the 2nd class business-level are respectively to remaining bandwidth connected applications priority height
Whole MS be respectively allocated fixation, then be respectively allocated bandwidth for each MS of whole applications of the 2nd class business-level.
Described cordless communication network dynamics of channels bandwidth allocation methods on demand, it is preferred that the ground floor dynamic bandwidth
Allocation strategy includes：
In the honeycomb texture that typical radio is accessed, it includes a BS and multiple MSi(i=1,2 ..., n)；From MS to
In the up-link of BS, access network is network of the multiple spot to single-point；The area of coverage opsition dependent of BS is divided into first multiple
Subregion Sj(j=1,2 ..., m) are easy to BS and are managed for the MS in region；Secondly, can be public in order to ensure each MS
The resource for fully sharing wireless air interface is equalled, first the subregion S residing for each MSjDistribute a certain size bandwidth, and
In every sub-regions SjIt is interior, then give each MS according to the demand assignment of service application group by the bandwidth distributed by scheduler；
Work as MSiWhen there are data to need to be communicated with BS, then the access of channel and the distribution of bandwidth can occur；Now MSiTo
BS reports the information such as its position being located, the data type to be transmitted and data volume；BS is according to its positional information by the MSiDraw
Assign to affiliated subregion SjIn, and calculate region MS at presentiAccount for ratio α of MS sums in BS overlay areasj, calculate the son
Region SjIt is middle to need the total amount of data of transmission to account for the ratio beta that all MS in BS overlay areas need the total amount of data of transmissionj；In order to
Preferably meet the QoS between each MS, design and be respectively allocated weight 0.4 to above-mentioned two ratio, 0.6, and sub-district is given in proportion
Domain SjDistribution channel width, i.e. SjChannel width B distributedjFor：
Bj=[(0.4 αj+0.6βj)B]Round
Wherein B is BS total bandwidths, []RoundRepresent round.
Described cordless communication network dynamics of channels bandwidth allocation methods on demand, it is preferred that the second layer dynamic bandwidth
Allocation strategy includes：
In subregion SjIn, the bandwidth point between each MS is carried out according to the business classification described in claim 4 and priority
Match somebody with somebody；When for subregion SjAfter distributing channel width, 1. plant and apply highest priority due to the of the 1st class business, be first it
The fixed bandwidth of distribution
Wherein, a is subregion SjIt is middle to need to transmit the of the 1st class business MS numbers for 1. planting application,It is subregion Sj
In the 1st class business the MS for 1. planting applicationaThe bandwidth of communication is needed,It is subregion SjIn the 1st class business the 1. plant should
With the total bandwidth that can distribute,It is subregion SjIn the 1st class business the MS for 1. planting applicationaThe bandwidth that can distribute；
It is that it reserves a part of bandwidth to ensure that the 2nd class business has minimum QoSEven if in network heavy burden
In the case of load, this fractional bandwidth also will not be occupied by the 1st class business, it is ensured that the 2nd class business will not be rejected service, then divide
2., 3., 4. the of the class business of dispensing the 1st plant the maximum bandwidth quantity of businessFor：
Application 2., 3., is 4. planted for the of the 1st class business, according to priority height carries out respectively bandwidth allocation：
2. the kind application of the 1st class business：
3. the kind application of the 1st class business：
4. the kind application of the 1st class business：
Wherein, b, c, d are respectively subregion SjIt is middle to need to transmit the of the 1st class business MS numbers 2., 3., 4. applied；It is respectively subregion SjIn the 1st class business the MS for 2., 3., 4. applyingb、MSc、MSdNeed transmission
Bandwidth；It is respectively subregion SjIn the 1st class business the 2., 3., 4. application can distribute
Total bandwidth；It is respectively subregion SjIn the 1st class business the MS for 2., 3., 4. applyingb、MSc、
MSdThe bandwidth that can distribute；Additionally, before high-priority service application distributes bandwidth, low priority traffice will not be given
Distribution bandwidth；
After for the 1st class business whole distribution bandwidth, by remaining bandwidth, on demand pro rate gives the 2nd class business, its
In the remaining bandwidth B of the 2nd class businessj2For：
In the bandwidth B that the 2nd class business is distributedj2In, 1), 2), 3), 4) plant the preferential of application according to the of the 2nd class business
Level height carries out respectively bandwidth allocation：
1) the kind application of the 2nd class business：
2) the kind application of the 2nd class business：
3) the kind application of the 2nd class business：
3) the kind application of the 2nd class business：
Wherein, e, f, g, h are respectively subregion SjIt is middle to need transmit the 2nd class business the 1), 2), 3), 4) to plant application
MS numbers；It is respectively subregion SjIn the 2nd class business the 1), 2), 3), 4) plant application
MSe、MSf、MSg、MShNeed the bandwidth of transmission； It is respectively subregion SjIn the 1st class business
The 1), 2), 3), 4) plant the total bandwidth that application can distribute；It is respectively subregion Sj
In the 2nd class business the MS for 1), 2), 3), 4) planting applicatione、MSf、MSg、MShThe bandwidth that can distribute；
Additionally, in subregion SjIn, keep the of the 1st class business 1. to plant and no longer become using assigned amount of bandwidth
Change, and be directed to other service application types, bandwidth be spaced at a fixed time in constantly can adjust service bandwidth to carry
The overall performance of high system.
Described cordless communication network dynamics of channels bandwidth allocation methods on demand, it is preferred that include：
Divided for business in network, be divided into 2 class business-levels, the 1st class business-level is real time business；2nd class
Business-level is non-real-time service；Persistent period, bandwidth demand further according to each business, being divided into 8 kinds should the 2 class business
With group and give priority.
Described cordless communication network dynamics of channels bandwidth allocation methods on demand, it is preferred that the business-level includes：
1st class business-level applies group including following 4 kinds, as follows：
1., audio service, network control traffic, the priority is set to 0；
2., visual telephone, video conference, the priority is set to 1；
3., interactive multimedia, VOD service, the priority is set to 2；
4., other real-time class business, the priority is set to 3；
2nd class business-level applies group including following 4 kinds, as follows：
1), E-mail, the priority is set to 4；
2), Telnet, data service, the priority is set to 5；
3), Record Carrier, the priority is set to 6；
4), other non real-time class business, the priority is set to 7；
Wherein, priority numeral arranges lower, represents priority higher.
In sum, as a result of above-mentioned technical proposal, the invention has the beneficial effects as follows：
The present invention is for being the mobile station in its area of coverage to base station in fixed area (Base station, BS)
The Channel Technology problem of (Mobile Station, MS) Dynamic Bandwidth Allocation, while considering that wireless access system is multiple services
QoS demand, proposes a kind of cordless communication network dynamics of channels bandwidth allocation methods on demand, and the method can effectively according to business
The each user of QoS demand decision-making needed for bandwidth, in the case where bandwidth resources are certain, bandwidth availability ratio can be significantly improved,
And while ensure the QoS of high-priority service.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment
It is substantially and easy to understand, wherein：
Fig. 1 is the honeycomb texture schematic diagram of wireless access of the present invention；
Fig. 2 is the priority corresponding diagram of 8 kinds of typical services applications of the invention；
Fig. 3 is the wireless access honeycomb texture schematic diagram of instantiation of the present invention；
Fig. 4 is the process chart of cordless communication network of the present invention dynamics of channels bandwidth allocation methods on demand.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " longitudinal direction ", " horizontal ", " on ", D score, "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward " is based on accompanying drawing institute
The orientation for showing or position relationship, are for only for ease of the description present invention and simplify description, rather than indicate or imply the dress of indication
Put or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the present invention limit
System.
In describing the invention, unless otherwise prescribed and limit, it should be noted that term " installation ", " connected ",
" connection " should be interpreted broadly, for example, it may be mechanically connected or electrical connection, or the connection of two element internals, can
Being to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term.
The present invention is directed to Dynamic Bandwidth Allocation problem, and in view of the multiple services different QoS requirements of wireless access system, carries
A kind of cordless communication network dynamics of channels bandwidth allocation methods are on demand gone out.The main thought of the method is covered first against BS
Scope divides subregion, is the corresponding bandwidth of all subregion dynamically distributes.Then, in the channel width of every sub-regions distribution
In, business is divided into into 2 classes (the 1st class business：Real time business；2nd class business：Non-real-time service), the 1st class business tool is ensured first
There is the amount of bandwidth of abundance, processed using the processing mode of integrated service model；But in order to ensure that the 2nd class business is unlikely to
By the situation of the complete occupied bandwidth of the 1st class business, first minimum guarantee bandwidth is reserved for such business.If the 1st class business
After distributing bandwidth, remaining more bandwidth, i.e., the situation of light load, then the 2nd class business equally can preferably be taken
Business；But if the 1st class business is in the case of heavy duty, then the 2nd class business can only be assigned to as its reserved minimum guarantee band
Width, and constantly adjusted to distributing to two kinds of service bandwidths in interval at a fixed time.
Technical scheme is as follows：
Accompanying drawing 1 is the honeycomb texture schematic diagram that typical radio is accessed, and it includes a BS and multiple MSi(i=1,2 ...,
n).In up-link from MS to BS, access network is network of the multiple spot to single-point.First by the area of coverage opsition dependent of BS
Divide many sub-regions S intoj(j=1,2 ..., m) are easy to BS and are managed for the MS in region.Secondly, in order to ensure each
MS fair can fully share the resource of wireless air interface, first the subregion S residing for each MSjDistribute a certain size
Bandwidth, and in every sub-regions SjIt is interior, then give each according to the demand assignment of service application group by the bandwidth distributed by scheduler
MS。
Work as MSiWhen there are data to need to be communicated with BS, then the access of channel and the distribution of bandwidth can occur.Now MSiTo
BS reports the information such as its position being located, the data type to be transmitted and data volume；BS is according to its positional information by the MSiDraw
Assign to affiliated subregion SjIn, and calculate region MS at presentiAccount for ratio α of MS sums in BS overlay areasj, calculate the son
Region SjIt is middle to need the total amount of data of transmission to account for the ratio beta that whole MS in BS overlay areas needs the total amount of data of transmissionj；In order to
Preferably meet the QoS between each MS, design and be respectively allocated weight 0.4 to above-mentioned two ratio, 0.6, and sub-district is given in proportion
Domain SjDistribution channel width, i.e. SjChannel width B distributedjFor：
Bj=[(0.4 αj+0.6βj)B]Round (1)
Wherein B is BS total bandwidths, []RoundIt is to represent round.
When for every sub-regions SjAfter distributing channel width, according to the different qos requirement of type of service, realize in bandwidth
The second sub-distribution.Comprising miscellaneous service streams such as voice, video, data in actual network data, some business are possibly used for
Low time delay, needs certain stable Bandwidth guaranteed, therefore designs allocated higher priority；During some ordinary data traffics pair
Prolong, packet loss it is insensitive, without special qos requirement, therefore, design be allocated lower priority.Based on this, the present invention first will
Uniform service in network is divided into 2 class business-level (the 1st class business：Real time business；2nd class business：Non-real-time service).Its
It is secondary, in order to represent various multimedia application business, persistent period, bandwidth demand according to miscellaneous service etc. above-mentioned 2 class business
8 kinds of different application groups are divided into, and give different priority, as shown in Figure 2：
1st class business-level includes following 4 class application group, as follows：
1., audio service, network control traffic (priority is set to 0, height)；
2., visual telephone, video conference (priority is set to 1)；
3., interactive multimedia, VOD service (priority is set to 2)；
4., other real-time class business (priority is set to 3)；
2nd class business-level includes following 4 class application group, as follows：
1), E-mail (priority is set to 4)；
2), Telnet, data service (priority is set to 5)；
3), Record Carrier (priority is set to 6)；
4), other non real-time class business (priority is set to 7)；
Wherein, priority arranges lower, represents priority higher.
Bandwidth allocation is carried out according to above-mentioned business classification and priority.In subregion SjIn, according to described in claim 4
Business classification and the priority bandwidth allocation that carries out between each MS；When for subregion SjAfter distributing channel width, due to the 1st
1. the of class business planted and apply highest priority, is first the fixed bandwidth of its distribution
Wherein, a is subregion SjIt is middle to need to transmit the of the 1st class business MS numbers for 1. planting application,It is subregion Sj
In the 1st class business the MS for 1. planting applicationaThe bandwidth of communication is needed,It is subregion SjIn the 1st class business the 1. plant should
With the total bandwidth that can distribute,It is subregion SjIn the 1st class business the MS for 1. planting applicationaThe bandwidth that can distribute；
It is that it reserves a part of bandwidth to ensure that the 2nd class business has minimum QoSEven if in network heavy burden
In the case of load, this fractional bandwidth also will not be occupied by the 1st class business, it is ensured that the 2nd class business will not be rejected service, then divide
2., 3., 4. the of the class business of dispensing the 1st plant the maximum bandwidth quantity of businessFor：
Application 2., 3., is 4. planted for the of the 1st class business, according to priority height carries out respectively bandwidth allocation：
2. the kind application of the 1st class business:
3. the kind application of the 1st class business:
4. the kind application of the 1st class business:
Wherein, b, c, d are respectively subregion SjIt is middle to need to transmit the of the 1st class business MS numbers 2., 3., 4. applied；It is respectively subregion SjIn the 1st class business the MS for 2., 3., 4. applyingb、MSc、MSdNeed transmission
Bandwidth；It is respectively subregion SjIn the 1st class business the 2., 3., 4. application can distribute it is total
Bandwidth；It is respectively subregion SjIn the 1st class business the MS for 2., 3., 4. applyingb、MSc、MSdInstitute
The bandwidth that can distribute；Additionally, before high-priority service application distributes bandwidth, low priority traffice distribution band will not be given
It is wide；
After for the 1st class business whole distribution bandwidth, by remaining bandwidth, on demand pro rate gives the 2nd class business, its
In the remaining bandwidth B of the 2nd class businessj2For：
In the bandwidth B that the 2nd class business is distributedj2In, 1), 2), 3), 4) plant the preferential of application according to the of the 2nd class business
Level height carries out respectively bandwidth allocation：
1) the kind application of the 2nd class business：
2) the kind application of the 2nd class business：
3) the kind application of the 2nd class business：
3) the kind application of the 2nd class business：
Wherein, e, f, g, h are respectively subregion SjIt is middle to need transmit the 2nd class business the 1), 2), 3), 4) to plant application
MS numbers；It is respectively subregion SjIn the 2nd class business the 1), 2), 3), 4) plant application
MSe、MSf、MSg、MShNeed the bandwidth of transmission； It is respectively subregion SjIn the 1st class industry
1), 2), 3), 4) the of business plant the total bandwidth that application can distribute；It is respectively subregion
SjIn the 2nd class business the MS for 1), 2), 3), 4) planting applicatione、MSf、MSg、MShThe bandwidth that can distribute；
Additionally, in subregion SjIn, keep the of the 1st class business 1. to plant and no longer become using assigned amount of bandwidth
Change, and be directed to other service application types, bandwidth be spaced at a fixed time in constantly can adjust service bandwidth to carry
The overall performance of high system.
To sum up, a kind of idiographic flow of cordless communication network dynamics of channels bandwidth allocation methods on demand is as follows：
Step 1, in fixed area, first many sub-regions S are divided into according to the scope opsition dependent that BS is coveredj(j=
1,2 ..., m), as shown in Figure 1；
Step 2, in the BS areas of coverage, judge mobile station MSiWhether to be communicated with BS, if desired then be entered step 3；
Otherwise do not operate, terminate；
Step 3, MSiTo BS reporting position informations, need the information such as the type and data volume size of transmission data；
Step 4, BS judge whether channel is idle, if idle, judge MS according to positional information firstiResiding subregion
Sj, into step 5；Such as not idle, end；
Step 5, BS calculate respectively all subregion SjαjAnd βjValue, while calculate being assigned to subregion SjLetter
The a width of B of road bandj=[(0.4 αj+0.6βj)B]Round；
Step 6, when for subregion SjAfter distributing channel width, BS is first the 1st kind of whole applied of the 1st class business
The fixed bandwidth of MS distribution, then it is respectively allocated bandwidth for the 1st kind of each MS for applying of the 1st class business；
Step 7, for the of the 1st class business MS for 2., 3., 4. planting application, it is the 1st class business that BS combines priority height
The the whole MS for 2., 3., 4. planting application be respectively allocated fixed bandwidth, then for the 1st class business the 2., 3., 4. planting should
Each MS is respectively allocated bandwidth；
Step 8, the MS for the 1st class business are all distributed and remaining bandwidth are calculated after bandwidth, and BS presses the band of the 2nd class business
1), 2), 3), 4) wide demand percentage, that the 2nd class business is respectively to remaining bandwidth connected applications priority height plant application
Whole MS are respectively allocated fixation, then are respectively allocated bandwidth for the of the 2nd class business each MS for 1), 2), 3), 4) planting application.
So far, according to above-mentioned method flow, it is possible to achieve in wireless access system be that different types of service is reasonable
Carry out the distribution of dynamic bandwidth.Also, the method has taken into full account the QoS factors of business, meeting the QoS of different business needs
Ask, improve the utilization rate of bandwidth, be suitable in multiple services wireless access applied environment.
Below in conjunction with the accompanying drawings 3 couples of present invention are described further, and the present invention in fixed area implementing cordless communication network
On demand dynamics of channels bandwidth allocation methods carry out the explanation of correlation.In the BS areas of coverage, BS available bandwidths B is 20MHz.Assume this
When the BS areas of coverage in have MS1(3)、MS2(2)、MS3(1)、MS4(2)、MS5(1)、MS6(2)、MS7(1)、MS8(7)、MS9(2)、MS10
(0) totally 10 MS, now n=10.(note：A(e)：A represents mobile terminal title, and e represents that the MS needs the big of transmitted data amount
It is little), part MS needs to be communicated with BS, and part MS and BS and no data is transmitted, in mourning in silence or idle condition.For example
MS10The communication data with BS is had no, therefore for MS10For, BS does not take any action.And for mobile terminal MS1、MS2、
MS3、MS4、MS5、MS6、MS7、MS8、MS9Have with BS data need send, then can occur channel width access with bandwidth point
Match somebody with somebody.
MS1、MS2、MS3、MS4、MS5、MS6、MS7、MS8、MS9The position for reporting its place to BS, the data class to be transmitted
The information such as type and data volume；Each MS is divided into affiliated subregion S by BS according to each MS present positions informationiIn, for example：Will
MS1、MS2、MS3It is divided into subregion S1, by MS4、MS5、MS6、MS7Subregion S2 is divided into, by MS8、MS9It is divided into subregion
S3, now m=3.The data volume reported according to each MS calculates MS numbers in the subregion, and to account for MS in BS overlay areas total
Ratio αj, for example, S1Account for MS sums in BS overlay areasCalculating MS in the subregion needs the sum of transmission
The ratio beta that whole MS in BS overlay areas needs the total amount of data of transmission is accounted for according to amountj, for example:S1In region, MS1The data of carrying
Measure as 3, MS2The data volume of carrying is 2, MS3The data volume of carrying is 1, therefore S1 needs the total amount of data of transmission to account for BS overlay areas
Middle whole MS need the total amount of data of transmissionReported according to each MS
Data type, BS is according to type of service prioritization (partitioning standards as shown in Figure 2, such as MS1[0]、MS2[3]、MS3[1]、
MS4[0]、MS5[1]、MS6[4]、MS7[5]、MS8[2]、MS9[1]；What wherein [] the inside represented is priority, and 0 represents priority
Highest, the like.
In order to preferably be the QoS demand for meeting each MS, many-sided influence factor is considered, divide respectively to aforementioned proportion
With weight 0.4,0.6, right back-pushed-type (1) is respectively all subregion distribution channel width, for example, MS1、MS2、MS3The sub-district at place
Domain S1The channel width of distribution is：
After channel width is distributed for all subregion, in every sub-regions SjIn the channel width of distribution, according still further to upper
The classification of the service application stated and priority carry out respectively bandwidth allocation.
To sum up, a kind of cordless communication network dynamics of channels bandwidth allocation methods on demand, as shown in Figure 4, are embodied as step
It is rapid as follows：
Step 100, beginning；
Step 110, in fixed area, first many sub-regions S are divided into according to the scope opsition dependent that BS is coveredj(j
=1,2 ..., m), as shown in Figure 1；
Step 120, in the BS areas of coverage, judge mobile station MSiWhether to be communicated with BS, if so, into step 3,
Otherwise do not operate, terminate；
Step 130, MSiTo BS reporting position informations, need the information such as the type and data volume size of transmission data；
Step 140, BS judge whether channel is idle, if so, then according to MSiThe positional information of offer judges the son residing for it
Region Sj, into step 5, if it is not, terminating；
Step 150, BS calculate respectively all subregion SjαjAnd βjValue, while calculate being assigned to subregion Sj's
Channel width is Bj=[(0.4 αj+0.6βj)B]Round；
Step 160, when for subregion SjAfter distributing channel width, 1. kind application distribution of the BS for the 1st class business
Fixed bandwidth
Step 170, each MS for 1. planting application for the 1st class business are respectively allocated bandwidth；
Step 180, after the MS that 1. for the 1st class business plant application distributes channel width, it is high that BS combines priority
It is low to be respectively the of the 1st class business and 2., 3., 4. plant the fixed bandwidth of application distribution
Step 190, each MS for 2., 3., 4. planting application for the 1st class business are respectively allocated bandwidth；
Step 200, after the MS for the 1st class business all distributes bandwidth, calculate remaining bandwidth, BS press the 2nd class business
Bandwidth demand ratio, remaining bandwidth is combined the of the 2nd class business 1), 2), 3), the priority height of 4) application, respectively
1), 2), 3), 4) the of 2nd class business plant the fixed bandwidth of application distribution
Step 210, each MS for 1), 2), 3), 4) planting application for the 2nd class business are respectively allocated bandwidth；
Step 220, end.
So far, cordless communication network dynamics of channels bandwidth allocation on demand is realized in fixed area.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
These embodiments can be carried out with various changes, modification, replacement and modification in the case of the principle and objective that depart from the present invention, this
The scope of invention is limited by claim and its equivalent.
Claims (7)
1. a kind of cordless communication network dynamics of channels bandwidth allocation methods on demand, it is characterised in that comprise the steps：
S1, forms ground floor Dynamic Bandwidth Allocation strategy：All subregion S is divided for base station rangej(j=1,2 ...,
M), the α of all subregion is calculated respectivelyjAnd βjValue, and for all subregion SjCorresponding channel width B of dynamically distributesj=[(0.4 αj
+0.6βj)B]Round；
S2, forms second layer Dynamic Bandwidth Allocation strategy：In the channel width of every sub-regions distribution, the 1st class is ensured first
Business-level has sufficient amount of bandwidth, is processed using the processing mode of integrated service model；Secondly, in order to ensure the
2 class business-levels by the situation of the complete occupied bandwidth of the 1st class business-level, first do not reserve minimum guarantee band for such business
It is wide；Therefore, distribute after bandwidth if the 1st class business-level, remaining more bandwidth, i.e., the situation of light load, then the 2nd
Class business-level is preferably serviced；But if the 1st class business-level is in the case of heavy duty, then the 2nd class business-level
Can only be assigned to as its reserved minimum guarantee bandwidth；Bandwidth can constantly adjust service bandwidth in being spaced at a fixed time
To improve the overall performance of system.
S3, ground floor Dynamic Bandwidth Allocation strategy and second layer Dynamic Bandwidth Allocation strategy joint are realized in fixed area to moving
The dynamics of channels bandwidth allocation on demand of dynamic platform (Mobile Station, MS).
2. cordless communication network according to claim 1 dynamics of channels bandwidth allocation methods on demand, it is characterised in that described
S1 includes：
S1-1, in fixed area, according to the scope opsition dependent that BS is covered many sub-regions S is divided intoj(j=1,2 ...,
m)；
S1-2, in the BS areas of coverage, judges mobile station MSiWhether to be communicated with BS, if desired then be entered S1-3；Otherwise not
Operation, terminates；
S1-3、MSiTo BS reporting position informations, need the information such as the type and data volume size of transmission data；
S1-4, BS judge whether channel is idle, if idle, judge MS according to positional information firstiResiding subregion Sj, enter
Enter S1-5；Such as not idle, end；
S1-5, BS calculate respectively all subregion SjαjAnd βjValue, while calculate being assigned to subregion SjChannel width
For Bj=[(0.4 αj+0.6βj)B]Round。
3. cordless communication network according to claim 1 dynamics of channels bandwidth allocation methods on demand, it is characterised in that described
S2 includes：
S2-1, when for subregion SjAfter distributing channel width, BS is first the audio service of the 1st class business-level, network control industry
Whole MS of business distribute fixed bandwidth, then each MS of the audio service for the 1st class business, network control traffic is respectively allocated band
It is wide；
S2-2, for the 1st class business-level other application MS, BS combine priority height for the 1st class business-level its
Whole MS that it is applied are respectively allocated fixed bandwidth, then are respectively allocated bandwidth for each MS of the other application of the 1st class business；
S2-3, the MS for the 1st class business-level are all distributed and remaining bandwidth are calculated after bandwidth, and BS presses the 2nd class business-level
Bandwidth demand ratio, remaining bandwidth connected applications priority height is respectively the 2nd class business-level whole applications it is complete
Portion MS is respectively allocated fixation, then is respectively allocated bandwidth for each MS of whole applications of the 2nd class business-level.
4. dynamics of channels bandwidth allocation methods on demand of the cordless communication network according to claim 1,2 any one, its feature
It is that the ground floor Dynamic Bandwidth Allocation strategy includes：
In the honeycomb texture that typical radio is accessed, it includes a BS and multiple MSi(i=1,2 ..., n)；From MS to BS
In up-link, access network is network of the multiple spot to single-point；Divide the area of coverage opsition dependent of BS into multiple sub-districts first
Domain Sj(j=1,2 ..., m) are easy to BS and are managed for the MS in region；Secondly, in order to ensure each MS can justice fill
Ground is divided to share the resource of wireless air interface, first the subregion S residing for each MSjDistribute a certain size bandwidth, and every
Sub-regions SjIt is interior, then give each MS according to the demand assignment of service application group by the bandwidth distributed by scheduler；
Work as MSiWhen there are data to need to be communicated with BS, then the access of channel and the distribution of bandwidth can occur；Now MSiTo on BS
Report the information such as its position being located, the data type to be transmitted and data volume；BS is according to its positional information by the MSiIt is divided into
Affiliated subregion SjIn, and calculate region MS at presentiAccount for ratio α of MS sums in BS overlay areasj, calculate the subregion
SjIt is middle to need the total amount of data of transmission to account for the ratio beta that all MS in BS overlay areas need the total amount of data of transmissionj；In order to more preferable
Ground meets QoS between each MS, designs and is respectively allocated weight 0.4 to above-mentioned two ratio, and 0.6, and subregion S is given in proportionj
Distribution channel width, i.e. SjChannel width B distributedjFor：
Bj=[(0.4 αj+0.6βj)B]Round
Wherein B is BS total bandwidths, []RoundRepresent round.
5. cordless communication network according to claim 1 dynamics of channels bandwidth allocation methods on demand, it is characterised in that described
Second layer Dynamic Bandwidth Allocation strategy includes：
In subregion SjIn, the bandwidth allocation between each MS is carried out according to the business classification described in claim 4 and priority；When
For subregion SjAfter distributing channel width, 1. plant and apply highest priority due to the of the 1st class business, it is solid for its distribution first
Fixed bandwidth
Wherein, a is subregion SjIt is middle to need to transmit the of the 1st class business MS numbers for 1. planting application,It is subregion SjIn the 1st
1. the of class business plant the MS of applicationaThe bandwidth of communication is needed,It is subregion SjIn the 1st class business the 1. plant and apply institute
The total bandwidth that can distribute,It is subregion SjIn the 1st class business the MS for 1. planting applicationaThe bandwidth that can distribute；
It is that it reserves a part of bandwidth to ensure that the 2nd class business has minimum QoSEven if heavy duty in network
In the case of, this fractional bandwidth also will not be occupied by the 1st class business, it is ensured that the 2nd class business will not be rejected service, in being allocated to
2., 3., 4. the of 1st class business plant the maximum bandwidth quantity of businessFor：
Application 2., 3., is 4. planted for the of the 1st class business, according to priority height carries out respectively bandwidth allocation：
2. the kind application of the 1st class business：
3. the kind application of the 1st class business：
4. the kind application of the 1st class business：
Wherein, b, c, d are respectively subregion SjIt is middle to need to transmit the of the 1st class business MS numbers 2., 3., 4. applied；It is respectively subregion SjIn the 1st class business the MS for 2., 3., 4. applyingb、MSc、MSdNeed transmission
Bandwidth；It is respectively subregion SjIn the 1st class business the 2., 3., 4. application can distribute it is total
Bandwidth；It is respectively subregion SjIn the 1st class business the MS for 2., 3., 4. applyingb、MSc、MSdInstitute
The bandwidth that can distribute；Additionally, before high-priority service application distributes bandwidth, low priority traffice distribution band will not be given
It is wide；
After for the 1st class business whole distribution bandwidth, by remaining bandwidth, on demand pro rate gives the 2nd class business, wherein the 2nd
The remaining bandwidth B of class businessj2For：
In the bandwidth B that the 2nd class business is distributedj2In, it is high according to the of the 2nd class business the priority for 1), 2), 3), 4) planting application
It is low to carry out bandwidth allocation respectively：
1) the kind application of the 2nd class business：
2) the kind application of the 2nd class business：
3) the kind application of the 2nd class business：
3) the kind application of the 2nd class business：
Wherein, e, f, g, h are respectively subregion SjIt is middle to need the transmit the 2nd class business the 1), 2), 3), 4) plant application MS
Number；It is respectively subregion SjIn the 2nd class business the MS for 1), 2), 3), 4) planting applicatione、
MSf、MSg、MShNeed the bandwidth of transmission； It is respectively subregion SjIn the 1st class business
1), 2), 3), 4) plant using the total bandwidth that can distribute；It is respectively subregion SjIn
1), 2), 3), 4) the of 2nd class business plant the MS of applicatione、MSf、MSg、MShThe bandwidth that can distribute；
Additionally, in subregion SjIn, keep the of the 1st class business 1. to plant and no longer change using assigned amount of bandwidth, and pin
To other service application types, bandwidth be spaced at a fixed time in constantly can adjust service bandwidth to improve system
Overall performance.
6. cordless communication network according to claim 1 dynamics of channels bandwidth allocation methods on demand, it is characterised in that bag
Include：
Divided for business in network, be divided into 2 class business-levels, the 1st class business-level is real time business；2nd class business
Rank is non-real-time service；Persistent period, bandwidth demand further according to each business, the 2 class business, is divided into 8 kinds and applies group
And give priority.
7. cordless communication network according to claim 6 dynamics of channels bandwidth allocation methods on demand, it is characterised in that described
Business-level includes：
1st class business-level applies group including following 4 kinds, as follows：
1., audio service, network control traffic, the priority is set to 0；
2., visual telephone, video conference, the priority is set to 1；
3., interactive multimedia, VOD service, the priority is set to 2；
4., other real-time class business, the priority is set to 3；
2nd class business-level applies group including following 4 kinds, as follows：
1), E-mail, the priority is set to 4；
2), Telnet, data service, the priority is set to 5；
3), Record Carrier, the priority is set to 6；
4), other non real-time class business, the priority is set to 7；
Wherein, priority numeral arranges lower, represents priority higher.
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